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\title{ Draw Line Segments in a Grid Viewport }
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\title{ Draw Line Segments in a Grid Viewport }
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\description{
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\description{
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  This function draws line segments.
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  This function draws line segments.
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}
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}
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\usage{
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\usage{
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grid.segments(x0=0, y0=0, x1=1, y1=1,
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grid.segments(x0 = unit(0, "npc"), y0 = unit(0, "npc"),
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              x1 = unit(1, "npc"), y1 = unit(1, "npc"),
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              default.units="npc", units.per.obs=FALSE,
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              default.units = "npc", units.per.obs = FALSE,
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              gp=gpar(), draw=TRUE, vp=NULL)
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              gp = gpar(), draw = TRUE, vp = NULL)
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}
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}
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\arguments{
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\arguments{
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  \item{x0}{ Numeric indicating the starting x-values of the line segments. }
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  \item{x0}{ Numeric indicating the starting x-values of the line segments. }
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  \item{y0}{ Numeric indicating the starting y-values of the line
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  \item{y0}{ Numeric indicating the starting y-values of the line
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    segments. }
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    segments. }